PRODUCT DATA SHEET
SPHERON® SO carbon black
GENERAL DESCRIPTION
The SPHERON® carbon black series have been specially developed by Cabot’s
Industrial Products business as part of Cabot’s ongoing commitment to address
market needs and promote solutions for future product design and processing
challenges.
SPHERON® SO carbon black conforms to ASTM N550 carbon black target values
and has high cleanliness and soft pellets for improved dispersion.
PERFORMANCE FEATURES
SPHERON SO carbon black is especially developed for extruded rubber
applications such as automotive weather stripping, hoses and profiles.
SPHERON SOA carbon black exhibits rubber reinforcement properties similar to
those of ASTM N550 carbon black, but imparts fewer visible imperfections on
the surfaces of extruded rubber parts. The improved cleanliness of SPHERON SO
carbon black can also contribute to a longer screen life (fewer screen changes)
and less wear on extruder barrel, screw and die from abrasion compared
to conventional ASTM carbon black products. SPHERON SO carbon black is
well-suited for industrial rubber applications which require good extrusion
characteristics and low hysteresis with more reinforcement than ASTM N700
and N600 type carbon black products.
TYPICAL APPLICATIONS
• Automotive weather stripping and door seals
• Extruded hoses and profiles
• Anti-vibration and other molded rubber parts
SPHERON® SO carbon black
TECHNICAL DATA
SPHERON SO carbon black exhibits
rubber reinforcement and processing
properties similar to those of ASTM
N550 carbon black, but imparts fewer
visible imperfections on the surfaces
of extruded rubber parts.
Test Formulation: 100 phr EPDM, 70 phr Paraffinic Oil, 15 phr Whiting,
Sulphur cure vulcanization system
SPHERON® SO
Loading (phr)
ASTM N550
125
125
74
74
73
73
13.3
14.0
100% Modulus, MPa
4.9
5.1
300% Modulus, MPa
12.1
13.2
Elongation at Break, %
349
336
PROCESSING PROPERTIES
Mooney Viscosity
ML (1+4) at 100°C, (M.U.)
PHYSICAL PROPERTIES
Hardness
Shore A
Tensile Properties
Tensile Strength, MPa
Extruded Tape defect counts
ASTM N550
Tape defect counts
2,000
Dispersion on 266 cm² of
extruded EPDM tape surface
SPHERON® SO
1,600
1,200
800
400
0
100-150 m
150-200 m
> 200 m
Tape defect size classes, (m)
NORTH AMERICA
SOUTH AMERICA
EMEA*
Cabot Corporation
1095 Windward Ridge
Parkway
Suite 200
Alpharetta, GA 30005
USA
TEL +800 472 4889
Cabot Brasil Industria e
Comércio Ltda.
Rua do Paraiso 148-5th floor
Sao Paulo – SP, Brazil
Paraiso CEP.: 04103-000
TEL +55 11 2144 6400
CUSTOMER SERVICE
0800 195959
Cabot EMEA Business Service Centre
SIA Cabot Latvia
101 Mukusalas Street
Riga, LV-1004
Latvia
TEL +371 67050700
*Europe, Middle East and Africa
CHINA
Cabot China Ltd.
558 Shuangbai Road
Minghang District
Shanghai 201108
China
TEL +86 21 5175 8800
ASIA PACIFIC NORTH
Cabot Japan K.K.
Sumitomo Shiba-Daimon Bldg. 3F
2-5-5 Shiba Daimon,
Minato-ku
Tokyo 105-0012
Japan
TEL +81 3 3431 1770
ASIA PACIFIC SOUTH
PT. Cabot Indonesia
Talavera Office Park
Jl. Letjen TB Simatupang
Kav 22-26, Cilandak
Jakarta 12430
Indonesia
TEL +62 21 27584100
This information is provided as a convenience and for informational purposes only. No guarantee or warranty as to this information, or any
product to which it relates, is given or implied. This information may contain inaccuracies, errors or omissions and CABOT DISCLAIMS ALL
WARRANTIES EXPRESS OR IMPLIED, INCLUDING MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE AS TO (i) SUCH INFORMATION, (ii)
ANY PRODUCT OR (iii) INTELLECTUAL PROPERTY INFRINGEMENT. In no event is Cabot responsible for, and Cabot does not accept and hereby
disclaims liability for, any damages whatsoever in connection with the use of or reliance on this information or any product to which it relates.
The SPHERON brand is a registered trademark of Cabot Corporation.
©2013, 2008, 2002, 2001 Cabot Corporation.
SPSO_pds 09/2014
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